Physiology Of Endurance Flashcards
How doesaderosine Triphosphate produce energy
High energy bonds are broken enabling cross bridge cycling
What is glycolysis?
Resynthesis of ATP from blood glucose or muscle glycogen
What does glycolysis require?
2 ATP
What is the net result of glycolysis
2 ATP molecules + 2 h+ ions + 2 pyryvate
What are the two processes of glycolysis
In presence of oxygen - pyruvate is transported into the mitochondria for oxidation
Without o2 -
Pyruvale combines with NADH to form lactate and NAD+
Pyruvate +NADH +H = lactate +NAD
The energy system that produces ATP at the fastest rate ?
Phosphagen system
How many molecules does glycolysis require in the investment phase ?
2
What is the negative by product of glycolysis
Nhh
NADH produced in glycolysis is used during aerobic respiration in the
T
What physiological changes does CPET test for ?
Oxygen consumption
Carbon dioxide production
Blood lactate concentrations
What is the definition of lactate threshold (LT1) ?
The intensity at which lactate begins to accumulate in blood faster than it can be removed
What is the definition of lactate turn point (LT2)?
The intensity that elicits a sudden and sustained increase in blood lactate concentrations.
Why can you work below level 1 threshold for a sustained amount of time ?
As there is no increase in blood lactate concentrations.
Hydrogen ions are being cleared from the blood faster than they are being produced.
What is the net result of working between LT1 and LT2 ?
A rise in blood lactate concentrations
Define VO2 max ?
The greatest rate of oxygen uptake attained during incremental exercise .
